A5034282300- Photochemistry and Electron Transfer Studies
- Protein Interaction Studies and Fluorescence Analysis
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Free Radicals and Antioxidants
- Gold and Silver Nanoparticles Synthesis and Applications
- Electrochemical sensors and biosensors
- Molecular Sensors and Ion Detection
- Antioxidant Activity and Oxidative Stress
- Dye analysis and toxicity
- Biochemical effects in animals
- Photosynthetic Processes and Mechanisms
- Luminescence and Fluorescent Materials
- Bone Tissue Engineering Materials
- Surfactants and Colloidal Systems
- Analytical Chemistry and Sensors
- Synthesis and biological activity
- Graphene and Nanomaterials Applications
- Photoreceptor and optogenetics research
- Electrochemical Analysis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Mesoporous Materials and Catalysis
- Glass properties and applications
- Advanced Photocatalysis Techniques
- bioluminescence and chemiluminescence research
Romanian Academy
2016-2025
University of Bucharest
2015-2018
Institute of Physical Chemistry
2013-2017
Academy of Romanian Scientists
2010-2014
Université de Strasbourg
2009-2013
Centre National de la Recherche Scientifique
2009-2013
Institut de Chimie de Strasbourg
2008-2010
Institutul Naţional de Cercetare Dezvoltare pentru Chimie si Petrochimie
2010
Institut de Chimie
2010
Four types of algae—Porphyra umbilicalis, Undaria pinnatifida, Cystoseira barbata, and Chlorella sp.—were used to obtain crude bioproducts enriched in polysaccharides (four bioproducts) create formulations with gold cations bioproducts). The obtained through aqueous extraction from barbata exhibited significant antioxidant activities a total polyphenol content (714.17 ± 1.26) mg GAE/L. In the derived extract Porphyra umbilicalis combined ions, nanoparticles sizes less than 34 nm were formed....
Finding innovative solutions to improve the lives of people affected by trauma, bone disease, or aging continues be a challenge worldwide. Tissue engineering is most rapidly growing area in domain biomaterials. Cerium-containing MBG-derived biomaterials scaffolds were synthesized using polymethyl methacrylate (PMMA) as sacrificial template. The obtained characterized X-ray powder diffraction (XRPD), infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Ce4+/Ce3+ ratio was...
In this study, three types of extracts isolated from leaves Plantain (Plantago lanceolata) were tested for their chemical content and biological activities. The bioproducts are combinations polysaccharides polyphenols (flavonoids iridoidic compounds), they antioxidant, antifungal, antitumor, prebiotic activity (particularly fraction). Briefly, the iridoid-enriched fraction has revealed a pro-oxidant activity, while flavonoid-enriched had high antioxidant potency; polysaccharide also...
Novel azulenyl functionalized dithienylethenes were synthesized, and their photochromic reactivity, fluorescent electrochemical properties investigated.
2′-(1-Imidazolyl)-4-methylphenol (C−N bonding in the ortho′ position at phenyl group), a model compound for tyrosine-histidine covalent linkage, was studied with combined electrochemical and UV−vis/IR spectroscopic approach. Electrochemical analysis of 2′-(1-imidazolyl)-4-methylphenol by means cyclic voltammetry yielded potential 0.48 vs ferrocene (1.15 V NHE) oxidation deprotonated form, reaction being kinetically irreversible. A tentative assignment electrochemically induced Fourier...
The following new compounds were obtained by reacting 4-chloro-7-nitrobenzofurazan (NBD-Cl, 1) with five primary amines: 3b a benzo-crown ether 18C6; 3c an N-(α-naphthyl)ethylenediamine group; 3d, 2,2,6,6-tetramethylpiperidin-N-oxyl 3e, αpicolyl and 3f, derived from tris(hydroxymethyl)aminomethanol.Also, the reaction of 1 N-methylhydroxylamine N-hydroxy-N-methyl-NBD derivative (3g) was prepared.All these six NBD derivatives 3b-g studied (in comparison known compound 3a prepared aniline) for...
4′-Azulenyl-substituted terpyridines were efficiently synthesized following the Kröhnke methodology via azulenylchalcone intermediates. These azulenyl-containing showed fluorescent emission with a fluorescence quantum yield varying from 0.14, in case of parent terpyridine, to 0.64 when methyl groups are grafted on azulenyl seven-membered ring. According crystal structures and TDDFT calculations, different twisting aromatic constituents is responsible for observed behavior. The...
Due to their spectral characteristics, phototoxicity and high affinity for tumour tissues, porphyrins derivatives are widely used in modern medicine as contrast agents cancer diagnostics sensitizers photodynamic therapy, where they kill tumours via enhancement of oxidative stress. The aim this work was simulate vitro the effects caused by oxidation two free base porphyrins, 5,10,15,20-tetraphenylporphyrin (TPP) 5,10,15,20-tetra(4-methoxyphenyl)porphyrin (TMOPP). kinetic study monitored using...
A mechanism which determines the difference in ability of deoxycorticosterone (DOC) to inhibit binding 3H-triamcinolone acetonide (3H-TA) glucocorticoid receptors rat heart and liver cytosols was investigated. DOC found strongly 3H-TA by cytosol, but exert only a slight inhibitory effect towards live cytosol binding. This not due influence enzymes sensitive molybdate ions, presence DOC-degrading or contamination blood serum. The devoid receptor activity heating contain factor modifying "in...
The NADH:ubiquinone oxidoreductase (complex I) couples the transfer of electrons from NADH to ubiquinone with translocation protons across membrane. It was proposed that electron involves quinoid groups localized at end chain. To identify these groups, fluorescence excitation and emission spectra Escherichia coli complex I its fragments, namely, dehydrogenase fragment containing flavin mononucleotide six iron–sulfur (Fe–S) clusters, quinone reductase three Fe–S clusters were measured....